22 years ago, H.O.T. debuted and captivated the hearts of many teenage girls. At the height of their fame, they decided to part ways but not before making a promise to their fans. They promised that the goodbye was temporary and that one day they will come back as one. As time passed, their fans wondered, "Will H.O.T. come back as a whole, just like g.o.d. and Sech Kies?" It's been 17 years since then, and the 5 members have finally come together to keep their promise through Infinite Challenge.

The fans have waited for long enough. They have brought out the white balloons again. Infinite Challenge has brought back H.O.T. from 17 years ago and reunited the 5 idol stars with their fans. H.O.T. and their fans all bring back their good old memories together.